Irene had $63 more than Emily at first. After Irene and Emily spent an equal amount of money, Emily had
310 as much as Irene. How much money did Irene have left?
|
Irene |
Emily |
Difference |
Before |
1 u + $63 |
1 u |
$63 |
Change |
- 1 |
- 1 |
|
After |
10 p |
3 p |
7 p |
Difference in the amounts between Irene and Emily
= 10 p - 3 p
= 7 p
Since both Irene and Emily spent an equal amount, the difference in the amounts that Irene and Emily had at first and in the end remains unchanged.
7 p = 63
1 p = 63 ÷ 7 = 9
Amount that Irene had left
= 10 p
= 10 x 9
= $90
Answer(s): $90